適用於Oracle的sqlhelper
需要使用ODP.Net，引用Oracle.DataAccess.dll 推薦安裝ODAC
代碼如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Reflection;
using System.Data;
using System.Configuration;
using Oracle.DataAccess.Client;
namespace DAL
{
public static class SqlHelper
{
#region 樣本
//標准連接-SSPI
private static readonly string defaultConnectString = "Data Source=ORCL;Integrated Security=SSPI;";
//標准連接
//private static readonly string defaultConnectString = "Data Source=ORCL;User Id=UPDM;Password=1234;";
//標准鏈接
//private static readonly string defaultConnectString = "Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=orcl)));User Id=system;Password=1234;";
#endregion
#region 變量
private static OracleConnection _con = null;
public static string _constr = ConfigurationManager.ConnectionStrings["orcl"].ToString();
#endregion
#region 屬性
public static string constr
{
get
{
if (_constr == null||_constr.Equals(String.Empty))
{
_constr = defaultConnectString;
}
return _constr;
}
set
{
_constr = value;
}
}
/// <summary>
/// 獲取或設置數據庫連接對象
/// </summary>
public static OracleConnection Con
{
get
{
if (SqlHelper._con == null)
{
SqlHelper._con = new OracleConnection();
}
if (SqlHelper._con.ConnectionString == null || SqlHelper._con.ConnectionString.Equals(string.Empty))
{
SqlHelper._con.ConnectionString = SqlHelper.constr;
}
return SqlHelper._con;
}
set
{
SqlHelper._con = value;
}
}
#endregion
#region 方法
/// <summary>
/// 執行並返回第一行第一列的數據庫操作
/// </summary>
/// <param name="commandText">Sql語句或存儲過程名</param>
/// <param name="commandType">Sql命令類型</param>
/// <param name="param">Oracle命令參數數組</param>
/// <returns>第一行第一列的記錄</returns>
public static int ExecuteScalar(string commandText, CommandType commandType, params OracleParameter[] param)
{
int result = 0;
try{
using (OracleCommand cmd = new OracleCommand(commandText, SqlHelper.Con))
{
try
{
cmd.CommandType = commandType;
if (param!=null)
{
cmd.Parameters.AddRange(param);
}
SqlHelper.Con.Open();
string x = cmd.CommandText;
result = Convert.ToInt32(cmd.ExecuteScalar());
}
catch
{
result = -1;
}
}
}
finally
{
if (SqlHelper.Con.State != ConnectionState.Closed)
{
SqlHelper.Con.Close();
}
}
return result;
}
/// <summary>
/// 執行不查詢的數據庫操作
/// </summary>
/// <param name="commandText">Oracle語句或存儲過程名</param>
/// <param name="commandType">Oracle命令類型</param>
/// <param name="param">Oracle命令參數數組</param>
/// <returns>受影響的行數</returns>
public static int ExecuteNonQuery(string commandText, CommandType commandType, params OracleParameter[] param)
{
int result = 0;
try
{
using (OracleCommand cmd = new OracleCommand(commandText, SqlHelper.Con))
{
try
{
cmd.CommandType = commandType;
if (param!=null)
{
cmd.Parameters.AddRange(param);
}
SqlHelper.Con.Open();
result = cmd.ExecuteNonQuery();
}
catch
{
result = -1;
}
}
}
finally
{
if (SqlHelper.Con.State != ConnectionState.Closed)
{
SqlHelper.Con.Close();
}
}
return result;
}
/// <summary>
/// 獲取數據表
/// </summary>
/// <param name="commandText">select命令</param>
/// <param name="param">參數表</param>
/// <returns></returns>
public static DataTable GetDataTable(string commandText,params OracleParameter[] param)
{
DataTable result = new DataTable();
try
{
using (OracleCommand cmd = new OracleCommand(commandText, SqlHelper.Con))
{
cmd.Parameters.AddRange(param);
try {
OracleDataAdapter adapter = new OracleDataAdapter(cmd);
adapter.Fill(result);
}
catch
{
result = null;
}
}
}
finally
{
if (SqlHelper.Con.State != ConnectionState.Closed)
{
SqlHelper.Con.Close();
}
}
return result;
}
public static int GetNextValueInSequence(string sequenceName)
{
if (ExecuteScalar("select count(*) from user_objects where OBJECT_NAME=:seqName", CommandType.Text, new OracleParameter(":seqName",sequenceName)) > 0)
{
return ExecuteScalar("select " + sequenceName + ".nextval from dual", CommandType.Text);
}
else
{
return -1;
}
}
/// <summary>
/// 事務模式執行多行非查詢語句
/// </summary>
/// <param name="commandText">sql語句</param>
/// <param name="param">參數</param>
/// <returns>受影響行數</returns>
public static int ExecuteNonQueryTransaction(string commandText, List<OracleParameter[]> param)
{
int result = 0;
try
{
using (OracleCommand cmd = new OracleCommand(commandText, SqlHelper.Con))
{
SqlHelper.Con.Open();
cmd.Transaction = cmd.Connection.BeginTransaction();
try
{
foreach (OracleParameter[] par in param)
{
cmd.Parameters.Clear();
cmd.Parameters.AddRange(par);
result += cmd.ExecuteNonQuery();
}
cmd.Transaction.Commit();
}
catch
{
result = -1;
try
{
cmd.Transaction.Rollback();
}
catch
{
result = -2;
}
}
}
}
finally
{
if (SqlHelper.Con.State != ConnectionState.Closed)
{
SqlHelper.Con.Close();
}
}
return result;
}
/// <summary>
/// 執行返回一條記錄的泛型對象
/// </summary>
/// <typeparam name="T">泛型類型</typeparam>
/// <param name="reader">只進只讀對象</param>
/// <returns>泛型對象</returns>
private static T ExecuteDataReader<T>(IDataReader reader)
{
T obj = default(T);
try
{
Type type = typeof(T);
obj = (T)Activator.CreateInstance(type);//從當前程序集裡面通過反射的方式創建指定類型的對象
//obj = (T)Assembly.Load(SqlHelper._assemblyName).CreateInstance(SqlHelper._assemblyName + "." + type.Name);//從另一個程序集裡面通過反射的方式創建指定類型的對象
PropertyInfo[] propertyInfos = type.GetProperties();//獲取指定類型裡面的所有屬性
foreach (PropertyInfo propertyInfo in propertyInfos)
{
for (int i = 0; i < reader.FieldCount; i++)
{
string fieldName = reader.GetName(i);
if (fieldName.ToLower() == propertyInfo.Name.ToLower())
{
object val = reader[propertyInfo.Name];//讀取表中某一條記錄裡面的某一列
if (val != null && val != DBNull.Value)
{
Type valType = val.GetType();
if (valType == typeof(float) || valType == typeof(double) || valType== typeof(decimal))
{
propertyInfo.SetValue(obj, Convert.ToDouble(val), null);
}
else if (valType == typeof(int))
{
propertyInfo.SetValue(obj, Convert.ToInt32(val), null);
}
else if (valType == typeof(DateTime))
{
propertyInfo.SetValue(obj, Convert.ToDateTime(val), null);
}
else if (valType == typeof(string))
{
propertyInfo.SetValue(obj, Convert.ToString(val), null);
}
}
break;
}
}
}
}
catch
{
throw;
}
return obj;
}
/// <summary>
/// 執行返回一條記錄的泛型對象
/// </summary>
/// <typeparam name="T">泛型類型</typeparam>
/// <param name="commandText">Oracle語句或存儲過程名</param>
/// <param name="commandType">Oracle命令類型</param>
/// <param name="param">Oracle命令參數數組</param>
/// <returns>實體對象</returns>
public static T ExecuteEntity<T>(string commandText, CommandType commandType, params OracleParameter[] param)
{
T obj = default(T);
try
{
using (OracleCommand cmd = new OracleCommand(commandText, SqlHelper.Con))
{
cmd.CommandType = commandType;
cmd.Parameters.AddRange(param);
SqlHelper.Con.Open();
OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
while (reader.Read())
{
obj = SqlHelper.ExecuteDataReader<T>(reader);
}
}
}
finally
{
if (SqlHelper.Con.State != ConnectionState.Closed)
{
SqlHelper.Con.Close();
}
}
return obj;
}
/// <summary>
/// 執行返回多條記錄的泛型集合對象
/// </summary>
/// <typeparam name="T">泛型類型</typeparam>
/// <param name="commandText">Oracle語句或存儲過程名</param>
/// <param name="commandType">Oracle命令類型</param>
/// <param name="param">Oracle命令參數數組</param>
/// <returns>泛型集合對象</returns>
public static List<T> ExecuteList<T>(string commandText, CommandType commandType, params OracleParameter[] param)
{
List<T> list = new List<T>();
try
{
using (OracleCommand cmd = new OracleCommand(commandText, SqlHelper.Con))
{
try
{
cmd.CommandType = commandType;
if (param != null)
{
cmd.Parameters.AddRange(param);
}
SqlHelper.Con.Open();
OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
while (reader.Read())
{
T obj = SqlHelper.ExecuteDataReader<T>(reader);
list.Add(obj);
}
}
catch (Exception ex)
{
list = null;
}
}
}
finally
{
if (SqlHelper.Con.State != ConnectionState.Closed)
{
SqlHelper.Con.Close();
}
}
return list;
}
#endregion
}
}
